Protecting-cap for furnace bridge-walls.



J. R. FORTUNE.

Patented Nov. 30, 1909.

APPLICATION FILED MAR. 18, 1909,

4 PROTECTING GAP FOR FURNACE BRIDGE WALLS.

QUNETEDSTACEES lgians? orrucn i 5 JOHN R. roi'e'rn'nn, or DETROIT, MICHIGAN, Ass-xenon TO MURPHY 1m WORKS, or

- DETROIT, MiCI-IIGAN, A CORPORATION OF MmI-IIGAN.

I lrnornc'rrhsoar FOR FU N CE" BRIDGE-WALLS.

'To all whom it may concern.

Be, it known that I, JO N R. FORTUNE, a citizen of the United States of America, residing at-Detroit,,in the county of Wayne and $tate of Michigan,-l1'a've invented certain new and useful Improvements in Protec'tingCaps for Furnace Bridge-Walls, of which the fol-lowingis a specification, reference being had therein'to the accompanying drawings.

-' In furnaces where-. there is a bridge wall at i the rear of the grate bars with its top in the plane of said grates and especially insmoke consuming furnaces having inclined grates andl a correspondingly inclined wall adja'-;

cent to the rear end of "saidgrat'es, it is 'foiind that the extreme heatgenerated with- Lin? the. furnaeerea-fises the clinkers or other residue frornitheffuel to melt and adhere to the top of theavall, soonchoking the furnaqe'and when removed tearing away parts V either-Wall; lthusl' -necessitating frequent r p The ob jectj of this' invention to" provide simple (and efiicient means for rotectlng such w lls and so constructing said means as to-adapt the same to difl'erent sizesand con 4 L ,-formed to engage and; rest upon the shield strnctionsj of furnaces.'

To this end the inventionconsists'fin the construetion as hereinafter mo'refully .de-.

- scribed" andparticularly pointed out in the claims, reference being had to the nying'drawings'ln Wl11(; l1i';.' a I" Figure- 1 1s a'perspect vedetailf'showing a i a *As shown ln the-dra vvingsl anti inclined I portion of the interior of alfurnacetv'ith the protecting cap embodying this invention in place upcnits inclined bridge wall. Fig. '2

is af'side elevation of two caps showing. the I sa gln placefand Fig. 3 1s anenlarged ansverse section of the same on 1111's bridge Wallfforniedof fire brick,-jthe topof iyhifeh extends substantially inlthe plane of the i pper edges ofinchned-grateibars :of the; V i I a 1. whiehrbarsare not-shown in the-"drawinga j bntfa-re adapted 5 to be supported fat-their lower ends upon the grate bearer. 2jwhich is supported at:v one end in'jthe' center of the 7 Ordinary arrangement and -10 bridge virall; sai;d wall being formed with the inclined; upper {edges extending downward from each" side of the furnace toward said .ihearer. .Bsting uponltheen'd ofrthe-bearer (12 springs across to. the oposite -si e nace 'fromflw ich sidewall the furn arch s Q Pa-j 'Spcificationiof LettersP-atent. Patented Nov. 30, 1909. "Application filed Martin .18, 1909. Serial No. 484,311.

and the adjacent Wall, is a shield 3, the construction and arrangement of the Wall,

bearer and shield all being old and well known. v

a I 4 represents the cap embodying the invention, andit consists of two plates 5 and 6 having a downwardly extending flanged edge 7 and the-plate 5 havingsuch a flange hollow ribs 9 having an internal diameter Whichis such that they fit over the ribs 8 at both edges. The top of the plate 5 is r and thus the plated is adapted to overlap at one-edge and lie upon the plate5 so that the over all width of the structure may be varied to fit different thicknesses of Wall to which the d'eviceinay be applied by sliding the plate (rupOn the plate 5. At their upper endsthe plates 5 and (i are cut away to form an openingfildfor the escape of air from the channels formed at, the lower'side 'ofthe plates by their downwardlyextending flanges, theiaii' enteringfreely into said channels at the lowerfend of the plates when the device -'is:in' place upon its bridge Wall.

The lower ends of the plates are' ypreferably fornied'to en age the'side wall 11 o the fur- Wall at a-shoizt-distance above t ds of e. up er the bridge'vvall ii- P Thefcap is placed upon thebridgewall' i' with one-end ngagingth'e furnace side Wall and: its flangesfresting upon'the top ef the waH/ {It is heldin thisiposition bythe grate bars (not shown) Which engage it. along one side. When so placed upon the Wall the flanges form air passages at thelower side of the late for air vvhieh may freely enter at the ower' 'endof the cap betvveen the' Wall j'a'nd the shield3, and; passing-through the passages, cools the plateand passes :out

through the'openingj 10 at the up 'er end of the 'cap.- The cap is thus'cooled and air is By'forini'ng the ap-with jthe ribs or chribs', torming protecting covering for 3 and the upper ends of the plate fi nges are also conductedtothe side wall of theffurv name where it mixes with the gases 'to aid 'combustion.-. 1 1

' vary the width of th'ecap.

the lates'so that they will not be burned'out by the flames coming in direct contact there- With, but this residue from the fuel not adhere to the plate because said plate is kept comparatively cool by the air passing beneath the same.- 5 -v A What Iclaiinas my inventionisz 1-. A protecting cap for furnace bridge Walls consisting of "a late formed with a; longitudinal air channel at its lower side and a second platewith a longitudinal air channel at its lower side and overlapping the-ffirst plate at one edge 'and'ad uStable thereon to a -2. A protecting cap forfurnace bridgewallsconsisting of a plate having downwardly extending flanges at each edge to a form a-lon 'tudinal channel at the lower side and'ipvr-lap site edgeandigigiustablethereon; 3.; Afpro'tecting cap for furnace bridge v of ,tliejsai plate,- a secondplatehavin a 20 downwardlyiextendin flange at one e ge the rst; plate at its oppo Walls consisting- 'of"-a plate formed with transverse ribs; a seeondiplate formed wlth c oncavo-oon vex rihs to fit-jover the ribs of the inpresenceof two witnesses i firstplate and adj stable thereon to Vary the width of the'capt il;

34. In asmojke; con

sidewall at theend; of the brid e wall, -a

i grate bearer. sup orted at ofie- -e nf u on thebridge Wa'll, an a grate-bearer shie d-=over the-t bearer at the lower. end ofthe .brid e -Wall;- of a protecting cap forithe'bridge'jva comprising a topplateand downwar I tendlng flanges to'forin ,a longitudinal a ii' passa 6 between the topof the'bridge. wall ande plate, the upperpnd of the flanges escape ofthe air from saidtop plate being dapted f'to engage one edge of the shield. I v v I Ingtestim'ony .whereofl aifix' my JOHN R. FORTUNE. .Witnessesr Ll O. GORDON,

-, Bose I furnace' th'e" combination with an inclined bridge f-wall,".-a"

beingadapted t'o engag the sidewall o-f'the 10 furnace and the platehetween" said flanges. being cut away to'forman opening for. the assage,radjacent to said side wall, ,and-theower endof the signature 

